Resilient gearing



moet. 12 1926.

Y 1,603,090 H. MEcKE u M SILIENT GEARING by ffii? His ATSC orney.

Ptemed logt. 12, d192e.

- BAN-Y, A' 'GoRronAmIoN on NEWwenn.;A '1Q RESILIENT GnAn'ING.

i' Application 'leo 'november 2S, ieee, sepia-N0. e'gsfoeemio inQefmezii'neemheelle?? The' preselltA invention Teletee to .gerngs and"more pltilc'nlerly .to neslentz geerings The usual form of L11-esilio@@r .feeble Whichth l'eifhitrtehiif'i 'es vWell esfh Coupled hvf "eideeiiie; twill he-vpieeeted 'againstA egjo'essive.lstnains'gind`f`s1`1o`okS..gV v For efihSidihiiOnhf; .what isf-b i0. he fiovel2.211,1@ 'the invention, attention is directed tOi .the accompanying!dfhivihe,

1 of. algeerngmeinber embodying' the `inven- Minion; eind Figs-.1 .212and i .are diegremmi- 'in Whielfi the invention moy be embodiedn.

n theltaperdend of `a shaft on which ie forced a `sleeve 6.11Thefs1ee'-1e iS held. 91.21 Vthe..Sheff by 21 'retinihgicap ,7threaded' .into the en@ Ofihe .,Shit;Y Tasindceted at 8, and.' abuttingdesi utilize@ almost, with:

h Shafts 'ber-f or, sleeve 6.

115.1911.'- Wiiehl the e'ei teethV 2,11*@ left-hond and. y

llnnd move "on and be gndredfby theley in?" 'gearingmihher When, 'ShockQi" Ystress.

of the; geenteeth11,l lont le fehteheiiier Sefitiloh This-news1 .isiformed. i

ring l0 y in j the nornoell position as shown in *the drawing, o .sljoent Strength A e: When e'ompressedto holo'lA the pinion ronn-Inovennent ppeletye to. the l, shaft and 1 vSleeve however, .exeesevepressure is fbrought [to beaofn the .teeth l1v et. the point ofoonteotvk with cooperating geaiVWheeILthe-vspying g Will yield-mandpermit ,the pinionv rngll() movement ofthe ring kl0 "axiallyg dependskto i move i 'along key' 12. @The lilecton of component ofllthe.thiust."onlthe geen/org.

fully empresse@ forms@.lo'ckiiigfmeehs on.

pinion; absorbed-hy.. @Oiled (Serieel .'iih.l

Pieiiides." 11 hehehe fer :resolving into wmf aXially to relieve thepressure of shocks or excess stresses.

Referring now to Figs. 1, 2 and 3, several examples of gearings forcoupling a pair of parallel shafts are shown, wherein a gear memberl ofthe type above described may be incorporated. In these figures, 17 maybe considered as the driving shaft and 18 the driven shaft. 19 indicatesthe shaft bearings. 2O and gears 21r mounted respectively on the drivingand driven shafts. The4 slant or angle of the teeth is indicated on eachpinion by aline 22. A Vline diagram is applied to lines 22 to show thedirection of the forcee acting on the teeth. ln these diagrams, line 28indicates the resultant tooth pressure, line 24 the aXial component ofthe resultant and line 25 the circumferential component of theresultant. p

The flexible gearing of the present inven` tion, as previously pointedout, provides ameans for absorbing the axial component of the toothpressure when the same becomes excessive. Thatfis, the pinion is, by thearrangement hereinbefore described, permitted toV movesubstantiallyaxially of the shaft in the direction of arrowed lines 23 so thatJ theaxial component of the tooth pressure 24 may be absorbed by a springwhich is compressed axially in the direction of lines 24 instead ofbeing absorbed by the gear teeth.` f

Viewed in another way, the pinion is permitted to stop while the shaftit is on, moves v against a spring action, said spring action absorbingforces ydirected against it axially of the shaft.V

In Figs. 2 and 3 pinions 2O would 4ordinarily be constructed inacordance with the embodiment of the'invention shown in Fig. l while thegears 21 would ,be secured directly to their shafts. Fig. 2 illustratesY a single gearing and Fig. 3 double gearing, one-half at each shaftend. Fig. l also shows av double gearing with both halves at thesame'shaft end. 1n this arrangement the pinions 2O are joined to form a'single pinion, while the driven gears 21 are divided. In this case, thedriven gears 21 would be those constructed in accordance with-theinvention as each must be capable of movement in the direction of arrow24;.

Thus the invention may be applied to driven Connecting these' shafts arepinionsV to move apart when actuated vto absorb shocks. In accordancewith the provisions of th patent statutes, the principle of theinvention .has been described, together with what is now considered torepresent the best embodiment thereof, but it should be understood 'thatthe invention may be carried out by other means consistent with theappended claims.

What l claim as new and desire to secure by Letters Patent of theUnited. States, is: 1. vThe combination with an annular ring havinghelical teeth on its periphery, of a cylindrical carrier member on whichsaid. ring is mounted, said ring being rotatably and slidablymovablethereon, a retaining annular tunnel formed partly in the ring andpartly in the carrier, a compressed helical spring located in saidtunnel, and guide means locatedbetween the ring and the car rier memberfor permitting relative movement of said ring and member in a direction.substantially at a right angle to the helical teeth. Y

2. The combination with an annular ring having, helical teeth on itsperiphery, of a cylindrical carrier member on which said ringis.mounted,fsaid-ring being rotatably and slidably movable thereon, aretaining annular tunnel formed partly 4in thering and partly in thevcarrier,` a compressed helical spring located in said' tunnel,- andguide means located between the ring and the car-` 1m' -rier member forpermitting relative move-r ment ofV said ring and member in response todriving pressure on the helical teeth in a direction to relieve saidpressure.

l3. In a gearing connecting a driving and a drivenshaft, thecombinationof a pair of meshing helical gear members, a carrying means for one ofsaid gear members Asecured on one of saidy shafts, andmeans interposedbetween the lgear member and the carrying means for rendering the gearmember resiliently movable axially with respect to said shaft, saidmeans includinga vspring compressible axially ofv the shaft and a spiralkey having a substantially equal and oppo-v site pitch to that of theteeth rof the gear members. Y Y

a. The combination with a. pair of shafts,

prising a helicall gear member on each of said shafts, one of said gearmembers being in the form of ajring withA teeth on rthe outer face, aring-,shaped carrying member for said gear ring secured on thek shaftand adapted to slidably receive said gear ring concentrically about it,a spiral key secured in the carrying member, a spiral keyway in the gearring into which the key projectsv Y whereby movement of the gear ring isguided by the key, and a compressed spiral spring encircling the shaftpositioned be,V

tween the gear ring and the carrying member to resilientlycushionmovement of the gear ring along the key.

5. The combination with a shaft, of a helical gear `mounted'thereon, andmeans interposed between said gear and shaft Vfor rendering said gearresillently movable thereon, said means comprising va helicalv f to the.shaftif Y t y 6. The combination with an annular ring having helicalteeth on itsfperiphery, o-f'a cylindrical Vcarrier member onwhich saidring is mounted,said ringbeing rotatablyk and slidably movable thereon,aV retaining annular VVtunnel formed partly in the ring and partly inthe carrier, a compressed helical 'helicalgear on whichosaid relativespringvlocated in said tunnelpand guide means locatedr between the ringand the carrier member `for permitting relative move-V ment of said ringand member, said means including a helical key which corresponds inpitch to the vhelical teeth `in an opposite direction thereto. v y t nv7. The 'combination with a shaft and a helical gear carried by theshaft, of meansy 'interposed between the gear and-shaft for' permittingsaid gear to move relatively to the yshalt inV response to drivingpressure Vnormal tothe vgear teeth, `said means com-- prising acompressed helical spring of al annular tunnel and a helical guide, keyot' corresponding-'opposite `pitch to that of the ment takes place.,

`\ In Witness whereof, I. havehereunto-sc,

my hand this lOthday of November, 1923. v l HERMANN MECKE, 7

movez single turn surrounding said shaft within an f

